You should not overtighten the fixings of the drive units as it can distort the chassis or damage the bolt’s thread.
The best solution is use a torque wrench using the following settings in Nm:
| Drive Unit type | ||||
| Model | HF | MF | LF | |
| twotwo series | 0.5 | 0.75 | ||
| twotwoSub2 | 3 | |||
| IB1, IB1S, IB1S-A | 0.75 | 0.75 | 3 | |
| DB1 Gold | 0.6 | 0.75 | ||
| 25 & 25i series | 0.6 | 0.75 | 0.75 | |
| fact & fact signature | 0.6 | 0.75 | 0.75 | |
| fact fenestria | 0.75 | 3 | 1 | |
| IB2 SE | 0.6 | 1 | 1 | |
| MB2/BB5 SE | 0.6 | 1 | 3 | |
| IB2S Active & Passive | 0.6 | 1 | 1 | |
| MB2S Active & Passive | 0.6 | 1 | 3 | |
| BB6 Active & Passive | 0.6 | 1 | 3 | |
| ci series | 0.5 | 0.6 | 0.6 |
If you are unsure or need assistance please contact our service department for further information – service@pmc-speakers.com